25
3. No sound
Check if the pin2 of
XA15 is 18V?
Check the
supply power
Is the signal
output NA5
(pin5
and pin8)
Is the signal output
NA4 (pin27 and pin28)
Is the signal output NA4
(pin67)
Is the signal output
TUNA1(pin12)
Replacing NA7
Replacing NA5
Replacing NA4
Check if the
pin1 and pin2 of
XA17 is 18V?
Is high level of
NA9
(pin1)
Check if
RA136 short to
the ground?
Which is high
level for DA8,
DA10, DA11?
Replacing TUNA1
Check the
pin3 of
X14
Check the
speaker output
1, 2 or 3,4
Check the
output
of V18
No
No
Yes
Yes
No
No
No
Yes
Yes
Yes
Yes
No
No
No
DA11
DA8
DA10
Summary of Contents for LC-42R27
Page 1: ...LCD TELEVISION LC 42 47R27 ...
Page 11: ...9 Fig 1 1 Simplified functional block diagram of the MSP 34x0G ...
Page 13: ...11 INTERNAL BLOCK DIAGRAM ...
Page 19: ...17 8 CXA2089Q ...
Page 28: ...Graphic Component IN of CPU board 203 L37R70 01DL Page 1 of 7 ...
Page 29: ...Video decoders of CPU board 203 L37R70 01DL Page 2 of 7 ...
Page 30: ...CPU board 203 L37R70 01DL Page 3 of 7 ...
Page 31: ...Frame memory of CPU board 203 L37R70 01DL Page 4 of 7 ...
Page 32: ...GM1601 of CPU board 203 L37R70 01DL Page 5 of 7 ...
Page 33: ...Memory I F of CPU board 203 L37R70 01DL Page 6 of 7 ...
Page 34: ...Power of CPU board 203 L37R70 01DL Page 7 of 7 ...
Page 35: ...Analog board 782 L37R7 5300 Page 1 of 2 ...
Page 36: ...Analog board 782 L37R7 5300 Page 2 of 2 ...
Page 37: ......
Page 38: ......
Page 39: ......
Page 40: ......
Page 41: ......
Page 43: ...603 L42R270 10 Ver 1 0 ...